Improvement in steam geneeatoe



@uiten fates. @anni @frn JOHN S. BARDEN, OF PROVIDENOE,v RHODE ISLAND,ASSIGNOR TO A. lJ.

PERRY te COMPANY, OE BOSTON, MASSACHUSETTS.

Letters Patent No. 62,807, dated Ilzbrucr'l/ 2G, ISST.

IMPROVEMENT IN STEAM GENERATOR.V

TO ALL PERSONS TQ WHOM THESE PRESEI'TS SHALL COME:

Be it known that I, JOHN S. IZARDEN, of the city and county ofProvidence, and State of Rhode Island, have invcntedan Improved SteamBoiler; and I. do hereby declare the same to be fully i escribed inV thefellowing specification, and represented in the accompanying drawings,cfwhichi i Figures 1 and 2 are longitudinal sections; and I Figures 3and 4 are transverse sections of it.

This boiler is mainly composed of a series of separate generators, A A,which are arranged side by side, and connected both at top and bottom ofeach, so as there te open ntoone another, and are so formed as. whentogether to make a iire-chamberror furnace and {lues leading therefrom,in manner as hereinafter specified. Each of such generators is composedof a chamber or vessel, a, crowned or convex at top and arched orconcave at bottom, and provided with two vhollow legs, B B', extendingdownward from and opening out of it; Each of such legs has a square erlozenge-shaped;section, and it terminates at bottom in ahollowprojection, c-, which is square in section, is open at top, and closedat its bottom. The legs of each generator are-to be arranged withrespect te the body of such generator in manner as represented in thedrawings. The ends,

lerown, and arch of such generator are continuations of the sides of thelegs, the same being so as to give to 'the generator the shape shown inthe drawings and form, with two end casngs or walls, D D, and the sidewalls G G of the {ire-place H, vertical dues E E, F F, each et which istriangular in transverse section. The inner dues F F are diving luesleading out of the fire-place. VEach two fines E F, formed between thelegs of any `of lthe next adjacent genera-tors, are to be made to,communicate with each other at theirlower ends, in order that the smokeof the fire-place, after ddscending the due F, may pass into the flue`E, and thence up the same into an escape lue, I, arranged over Vtheseries of generators, and common to all of them. A There is a recess, f;formed in the middle of lthe external side or snrfaceioi each generator,and continued iipward from the arch to the crown thereof, such recessesbeing to form tlues 'for the escape of smoke into the chimney. Dampersmay be applied to these ilues so as to close them when it may hedesirableeto have the smoke pass into the dues F. A pipe, g, is led outof the top of each generatonand is to open into a cross-pipe, t, thesame being in order to connect theseveral steam spaces of the generatorsand takel steam from all of them when they maybe in use. The tire-placeH has aimouthfz', and a grate, 7c. `The front and 4rear ends ofthe saidtire-place are formed by plates or Walls suitably applied'` to theexternal generators of the series. It is intended that each section orgenerator shall be made of cast iron'and be founded in one piece. Whenseveral of them are arranged Vside by side, in manner as exhibited inthe drawings, they constitute a boiler which presents a great amount ofheating surface, and has its dues formed mainly by the series, in manneras hcreinbfore explained.

I am aware that it is not 'new to construct a boiler of several hollowvessels, arranged side `by.side, anr;l having pipes of communicationleading from the water and steam spaces of one into those of the otherof them; therefore I do not claim such. My invention is an improvementon such a boiler.

I therefore claim the improved construction, substantially asdescrbedfof each oi' the sections er gen-V erators A A, so as to causethem to form, with the internal and casings Gr D, thetriangularsectionai diving ilues F and ascending ilues E, arranged inmanner and so as to open into each other as explained.

I also claim the combination as Well as the arrangement of the casings DD and G G with the generators, made'as described, the same being so asto form triangular sectional diving and ascending ilues E F, asspecified.

I also claim the arrangement, as described, of the smoke recast-.if inthc external side or surface of each; generator, the same being' as andfor the purpose specified.

y Jou-N` sl canoas.

Witnesses:

H. EDDY, F. P. HALE, Jr.

